US2000555A - Drive for fuel pumps for combustion power engines - Google Patents

Description

H. BECKER 2,000,555 DRIVE FOR FUEL PUMPS FOR COMBUSTION PQWEB ENGINES v May 7, 1935.

Filed Deb. 1'7, 1930 llll'i I 1 l & 15:2 2?

" Patented May'7, 1935 PATENT 'OFFICE- naive run run. ruins roa COMBUS- rron rowan memes Heinrich Becker, Augsburg Maschinenf to mour.

Application December 17. 1930,

' In Germany'l'leoember This invention relates to internal combustion engines, and more particularly to fuel supply means therefor. I

One of the principal objects of the invention is the provision of a fuel feeding meansfor internal combustion engines in which the fuel pump isoperatedbyacammounteddirectlyonthe crankshaftoftheengine.

Another object of the invention is the provision of a multi-cylinder internal combustion engine each cylinder having a fuel valve operated -by a mechanism which' feeds fuel to the valve of an adjacent cylinder. I

Other objects and advantages of the invention will be apparent fromthe following description,

the appended claims and the a drawing, in which:

Fig.1isa sectionofanenginehavingafuel pump drive cm the present invention;

Figs.2and3a1efrontviewsdaportionofthe engine, shown partly in section. illustrating. the two positions of the 'cam operated lever; FlgAisasectionalvlewoIapartoftheengine showing a modified form 11 construction; and

Fig.5isatopplanviewofaportionofthe engineshowninflg.4. I. particularly to the drawing yreferenceletteral'lg.lshowsaportlonof an internal combmtion engine, having any suit- 30 ablenumberofcylindersinwhicharepistons fuel Germany, amlgnor abrlk Augsburg-Humbug A. 6., Germny, a corporation of Germany SerlaINo. mm

in the housing so that the roll a will be maintained in engagement with the cam j. The cam plate I is secured to the crank arm by screws el which pass through annular slots in the cam plate so that the latter may be adjusted in the direction of 5 its movement. It will thus be apparent that the fuel is suppliedto an engine cylinder by a fuel pump which is driven from the crank'arm associat'ed with that particular cylinder so that the fuel injection will take place when the piston is 1 near the upper end of its. stroke.

For engines adapted to operate in reverse directions, a second cam II is provided in addition tothecamt. Therollgofthecam leverhmay be moved into engagement with either of these 16 cams depending upon the direction.of rotation desired, by longitudinal movement of the shaft 1'. Before moving the shaft i longitudinally the roll cisliftedfromthecam. Forthis purposes. jaw o is keyed on the shaft tso as to cooperate with 20 a similar Jaw p provided on the hub of the lever h. when the shaft i is turned, the Jaw o engages the jaw p and lifts the roll a from the cam which it engages, after which the shaft i is moved longitudinaliy so that the roll a will be opposite 25 the other cam.

'I'oadiusttherollgandvarythetimethatthe injection period begins, an'adiusting screw q is provided in thehousingrofthe engine, the screw mlnsanarmhl rigidwiththeleverh (seel'ig.

1). The arm h is wide enough to contact with the screw q when lever h is in'pontion to engage either'ofthecamsforf'. Asamodiiiedform.

of construction the arrangement shown inl i'g. 4

maybeused,inwhichthepush-rodkofthefuel pumpplimgerisprovidedwithaparts. 'lhispart awhichisflxedtotherodklimitsthedownward movement of the rod, as it engages the top of anuttwhichisthreadedon asleeveumounted onthepumphousing. Byturningthenut,the 40 lower limit of movement of the push-rod k may be raised-or lowered, andasthelowerendofthe push-rodisoperablyconnectedtothecrankshaft in'themannershown'inl 'ig. Ltherollgof the camlevermaybeadiustedreiativetoitscooperating cam.

In engines in which the fuel is injected by meansofcompressedainasshowninl 'igsiand 5 .thefuel valvesvarepreferably operatedatthe proper times in the cycle of operation by connectionstothefuelpumpm. 'Ihusthe fuel valve operating means of one cylinder is ldaptedtofeedfueltothefuelvalveofanad- Jacent cylindersothattheproper amount offuel willbesuppliedtothefuelvalvebeforethepre- Ii in the fuel valve into the engine cylinder.

determined time of opening. The part s on the pump plunger is is shown having an arm sl carrying a rod w which in turn is connected to the operating lever a: of the fuel valve 11. When the fuel valve is opened compressed air forces the fuel The fuel is supplied to the fuel valve before the latter opens, the fuel being forced to the fuel valve as the pump plunger of an adjacent cylinder is raised, and the fuel being retained in the valve until the valve is opened. Thus the fuel valve of each cylinder may be supplied from the pump mounted on an adjacent cylinder. and operated by the crank arm associated with such adjacent cylinder.

Fig. 5 shows the fuel pump a of the cylinder designated by the numeral I arranged to supply fuel to the valve '0 of cylinder 2, while the pump mounted on cylinder 2 supplies fuel to the valve of the cylinder I, the fuel pipes y and z crossing to complete the necessary connections between the fuel valve chambers of the cylinders, and the pumps.

While the forms of apparatus herein described constitute preferred embodiments of the invention, it is to be understood that the invention is not limited to these precise forms of apparatus, and that changes may be made therein without departing from the scope of the invention which is defined in the appended claims.

What is claimed is:

1. In an internal combustion engine, in combination, a piston and cylinder construction, a crank shaft connected to the piston, a fuel pump having a pump plunger for supplying fuel to the cylinder, a pair of cams on the crank shaft, a cam lever pivotally supported on a fixed axis and adapted to be operated by either of said cams and operably connected to the pump plunger, and means for moving said cam lever along said axis and from one of said cams to the other.

2. In an engine having a crank shaft and a fuel pump for supplying fuel to the engine cylinder, a

pair of cams on said crank shaft, a cam lever adapted to be operated by either of said cams and forming a driving means for said fuel pump, a rotatable and endwise movable shaft rotatably supporting said cam lever, and coupling means on said shaft and cam lever so that the lever may be lifted from the cam with which it is in engagement by rotational movements of said shaft and moved to a position to engage the other cam by longitudinal movement of said shaft.

3. In an internal combustion engine of the character described, engine cylinders, pistons operable therein, a crank shaft connected to said pistons, cams on said crank shaft, fuel pumps provided on the sides of said cylinders and each having a pump plunger mounted for reciprocatory movements in a direction parallel to the cylinder axis for supplying fuel to said cylinders, each fuel pump having an end thereof closely positioned adjacent a cylinder end, a fuel supply conduit connecting each pump end to a cylinder, and mounted plunger operating levers actuated by said cams in directions substantially radially of the crank shaft axis.

4. In an internal combustion engine, a piston and cylinder construction, a crank shaft having an eccentric crank pin operably connected to the piston and crank arms fixed to said crank shaft and extending to one side of the shaft axis for the support of said crank pin, a fuel injection nozzle in the cylinder, a fuel pump for supplying fuel to said injection nozzle and provided on the side of the cylinder with its upper end closely adjacent the upper end of the cylinder, a short fuel pipe connecting said pump and said nozzle, a pivoted lever for operating said fuel pump, and a segmental shaped cam fixed on the outer end of one of said crank arms and engageable with a portion of said pivoted lever to move the same in a direction substantially radially of the crank shaft to energize said fuel pump.

. HEINRICH BECKER

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